A drainage device for medium and low pressure drainage pipes

Abstract

This utility model discloses a drainage device for medium and low pressure drainage pipes. Its structure includes a steam pipe and a main drainage pipe connected to the steam pipe. An isolator and a drain valve are installed in the main drainage pipe, and an external filter is installed between the isolator and the drain valve. By adopting the above technical solution, the drainage device for medium and low pressure drainage pipes provided by this utility model, without changing the original structure of the drain valve, can effectively block pipe wall erosion carried by condensate by installing an external filter at the front side of the drain valve inlet. Furthermore, regular cleaning of the filter screen reduces the frequency of maintenance on the drain valve itself. In addition, because the external filter and the drain valve are installed horizontally, condensate or steam can pass through the filter screen evenly and continuously, reducing the risk of gas retention, avoiding intermittent drainage problems, and ensuring that impurities are evenly deposited at the bottom of the filter screen, preventing impurities from directly impacting a specific point on the filter screen when installed vertically, thus reducing localized wear on the filter screen.

Description

Technical Field

[0001] This utility model relates to a drainage device for medium and low pressure drainage pipes. Background Technology

[0002] Steam pipelines are widely distributed in thermal systems. As steam flows through these pipelines, it dissipates heat to the surrounding environment through the pipe walls. As the temperature drops, some of the steam loses its latent heat and condenses into liquid water. Alternatively, the steam pressure may gradually decrease during transport, causing its saturation temperature to drop and further promoting condensation. Condensate can dissolve oxygen or carbon dioxide, accelerating corrosion of the pipeline's inner walls, and the flow of accumulated water can also cause erosion. Drainage systems automatically discharge this condensate through steam traps to prevent water accumulation from affecting steam quality or causing water hammer, thus extending the pipeline's lifespan.

[0003] In the existing technology, the steam trap is installed directly after the isolation door of the main drain pipe. After long-term use, the condensate carries the pipe wall debris and accumulates inside the steam trap, causing the steam trap to gradually fail and affecting the drainage effect. Utility Model Content

[0004] The purpose of this invention is to provide a drainage device for medium and low pressure drainage pipes to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a drainage device for medium and low pressure drainage pipes, the structure of which includes a steam pipe and a drainage main pipe connected to the steam pipe, wherein an isolation component and a drainer are provided in the drainage main pipe, and an external filter is provided between the isolation component and the drainer.

[0006] Preferably, the isolation component includes a main drain valve, a manual drain valve located behind the main drain valve, and an external filter located behind the manual drain valve and in front of the drain inlet.

[0007] Preferably, the external filter is installed horizontally on the front side of the condensate drain inlet.

[0008] Preferably, it also includes a drainage bypass connected to the drainage main, one end of which is connected to the front side of the manual door in front of the drain, and the other end of which is connected to the rear side of the drain. A drainage bypass manual door is connected to the drainage bypass.

[0009] Preferably, the other end of the drainage main is connected to a water collection pit.

[0010] As can be seen from the above description of the structure of this utility model, compared with the prior art, this utility model has the following advantages:

[0011] This utility model provides a drainage device for medium and low pressure drainage pipes. Without changing the original structure of the drainage device, an external filter is installed at the front side of the drainage inlet. This effectively blocks pipe wall scour carried by condensate. The filter screen can be cleaned regularly, reducing the maintenance frequency of the drainage device. In addition, because the external filter and the drainage device are installed horizontally, condensate or steam can pass through the filter screen evenly and continuously, reducing the risk of gas retention and avoiding intermittent drainage problems. Furthermore, impurities are evenly deposited at the bottom of the filter screen, preventing impurities from directly impacting a certain point of the filter screen when installed vertically, thus reducing local wear on the filter screen. Attached Figure Description

[0012] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0013] Figure 1 This is a schematic diagram of a drainage device for medium and low pressure drainage pipes according to the present invention. Detailed Implementation

[0014] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0015] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] Example

[0019] refer to Figure 1 A condensate drain device for medium and low pressure condensate pipes is disclosed. Its structure includes a steam pipe 1 and a main condensate drain pipe 2 connected to the steam pipe 1. An isolator and a steam trap 3 are installed in the main condensate drain pipe 2, and an external filter 4 is installed between the isolator and the steam trap 3. With this structure, without altering the original construction of the steam trap 3, the installation of an external filter 4 at the inlet of the steam trap 3 effectively blocks pipe wall debris carried by condensate. Furthermore, regular cleaning of the filter screen reduces the frequency of maintenance on the steam trap 3 itself.

[0020] The external filter 4 is horizontally installed in front of the inlet of the steam trap 3. With this structure, since the external filter 4 and the steam trap 3 are installed horizontally, condensate or steam can pass through the filter screen evenly and continuously, reducing the risk of gas retention, avoiding intermittent drainage problems, and impurities are evenly deposited at the bottom of the filter screen, avoiding the direct impact of impurities on a certain point of the filter screen when installed vertically, thus reducing local wear of the filter screen.

[0021] The isolation components include a main drain valve 51, a manual drain valve 52 located behind the main drain valve 51, an external filter 4 located behind the manual drain valve 52 and in front of the inlet of the drain 3; it also includes a drain bypass 6 connected to the main drain pipe 2, one end of the drain bypass 6 connected to the front of the manual drain valve 52, and the other end of the drain bypass 6 connected to the rear of the drain 3, with a drain bypass manual valve 61 connected to the drain bypass 6; the other end of the main drain pipe 2 is connected to a collection pit 7.

[0022] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A drainage device for medium and low pressure drainage pipes, characterized in that: Its structure includes a steam pipe and a main drain pipe connected to the steam pipe. The main drain pipe is equipped with an isolation component and a drain valve. An external filter is installed between the isolation component and the drain valve. The isolation component includes a main drain valve and a manual drain valve located behind the main drain valve. The external filter is located behind the manual drain valve and in front of the drain inlet. The external filter is horizontally installed on the front side of the water inlet of the condensate. It also includes a drainage bypass connected to the main drainage pipe, one end of which is connected to the front side of the manual door in front of the drain, and the other end of which is connected to the rear side of the drain. A drainage bypass manual door is connected to the drainage bypass. The other end of the main drainage pipe is connected to a water collection pit.

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